Smoke-consuming furnace



1,536,649 C. E. BETCHER SMOKE CONSUMING FURNACE Fld'Apl 26, 1924 5 Sheets-Sheet 1 May 5, 1925.

Z'N VEN TOR: CHEsER E BE7-CHER.

/I TroR/vs Ys May 5, 1925. A 1,536,649

C. E. BETCHER SMOKE CONSUMING FURNACE Filed Ap'l 2e. 19,24 s sheets-sheet 2 .'Z'NvE/vToR. CHESTER E. BErcf/ER,

BYMMM/M ATTORNEYS.

C. E. BETCHER SMOKE coNsUMING FURNACE 3 Sheets-Sheet 3 I/v VEN TOR.' CHEs TER E. BE TCHER,

A TToRNsYs,

l-atented May tf, 1925?;

unirse stares' enormement/tine :Wannen Application filed April 2G, 1924. Serial Neff/09,157'.

.To all 'whom t may concern: l l

Be it known that I, Cr-rns'rnn E. Bnrrorrnn, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Smoke-A Consuming Furnaces, of which the following is a specification. 1 e

My invention relates to smoke consuming furnaces, and an object is to provide means ,for securing more perfect combustion of fuel than is possible in furnaces which are now in common use. In the customary furnaces which are extensively used only an1 imperfect combustion of the fuel is obtained and a considerable percentage of the gaseous products passes out into the air in an unconsumed condition. y large `amount of heat is lost and quantities of smoke and soot are discharged into the atmosphere with resultant injurious effects. ln carrying out my invention, I provide a lireboX construction by means of which the smoke and gases from the fuel are subjected to a high degree of heat before they are given an opportunity to escape throughl the chimney.

L'lhe full objects and advantages of my invention will appear in connection with the foregoing description, and the novel features of my inventive 'idea will `be particu larly pointed out in the claims.

ln the accompanying drawings whichV illustrate one form in which my invention may be embodied, Fig.` 1 is a view of a furnace in vertical section having my improvement embodied therein. Fig. 2 is a view in vertical sectiontaken atright angles to Fig. 1. Fig. 3 is a view in horizontal section on the `line 3-3 of Fig. 2. Fig. 4

`is a view in horizontal section onthe line` 4-4 of Fig. 2. Fig. 5 is a view in horizontal section on the line 5-5 of Fig.` 2.

lleferrin to the construction shown in the drawings, the numeral 10 designates the casing of a furnace or boiler which is shown as a hot water furnace having water pas- `sageways 12 but it will be understood that the invention is not limited to this typeof furnace and may be employed to advantage in other types.

As shown in Fig. 2, the lower portion of the casing 10 encloses a irebox` 14 at the rear of which is av combustion chamber 16. The bottom of the firebox consists of a grate hav- The result is that aV ing lined grate bars 18 and alternating movable grate bars 20. Two shafts 22 and 24 pass through the grate bars and these shafts where they pass through the movable grate bars are `provided with eccentrics 26 which turn in openings in said bars. l The shafts 22 and 24 carry crank arms which are connected by a bar 28 whereby the shafts are caused to rotate in unison when a crank handle 1s applied to one of them so that a four-way motion 1s imparted to the grate bars 20, this motion consisting of successively rearward, downward, forward, and upward movements which carry the fuel rear wardly when the shafts are operated. The stationary grate bars licontain longitudinal air passages 30 having a series of upwardly directed escape openings 32. The passageways rdat their forward ends are connected with an air supply pipe 34. Between the fireboi; 14 and the combustion chamber 16 is a firewall 36 which is hollow so that a cooling medium may be introduced. As shown, the interior of the firewall is in communication withthe water passages 12 and this firewall extends downwardly from the top of the fireboX and is spaced from the bottom thereof. In front of and spaced from the firewall S6 is a vertical grate which in the form shown consists of a` plurality of hollow grate bars 38 separated by slots 39 and which extend down from the top of the firebox and are connected at the bottom by a hollow horizontal member 4() spaced above the bottom of the fireboX. y rlhese grate bars are cooled lpreferably by being in communication with chamber 16 is a plate 42 which at its rearV edge is pivotally attached to the base member 44. The plate 42 is pivotally attached by being secured to a shaft 46 to which is secured a handle 48 carrying a pin 50 which may be engaged in any one of a number of holes 52. W hen the pin() is pulled out, the plate 42 swings downwardly so as to discharge into the ashpit any ashes andclinkers which have accumulated upon the plate. Furthermore, the plate 42 may be employed as a check damper by adjustably securing it with any desired downward inclination so that more or less cold air from the ashpit will be allowed to pass directly into the combustion chamber without passing through the fire. The plate 42, therefore, serves as a dumping` bottom and as a cold air check. A. gas or oil jet burner 53 extends into the combustion chamber 1G and this burner may be lit when the lire is low or is being` started and it will serve to burn up the smoke which is always present when starting; a lire. This burner may also be used when it is desired to crowd the vFire. A pipe ill for compressed air is shown. extending into the lower portion of the space above the combustion chan'iber.

'lne confipressed air may be turned on and delivered through the pipe when desired for cleaning out the furnace.

The operation and advantages of my invention will be readily understood in connection with the foregoing` description. The coal which is place(l in the rebox piles up against the lower vportion of the vertical grate and the smoke and gases pass between the vertical grate bars and are directed downwardly by the firewall so as toy pass into the hottest part of the fire. The movable Ierrate bars when operated move the fuel after. it has been fully ignited toward the lirewall so that the lire is much hotter at this place than it is in the forward portion of the tirebox where .fresh fuel is introduced. Jashes and clin'kers which accumulate upon the dumping; bottom 4:2 may be readily discharged into the ashpit bv tilting` this bottom. llllien the bottom 42 is left in tilted position cold air .from the ashpit is allowed to `flow into the combustion chamber and check the fire. Compressed air may be .forced through the stationary grate bars when desired tov assist in combustion.

l claim:

l. A. furnace comprising a lirebox, a coinbustion chan'iber, a firewall between said iirebox and said combustion chamber and spaced above the bottoms thereof, and a grate consisting` of vertically disposed, depending grate bars spaced in front of said iirewall having its lower end spaced above the bottoni of said iirebox.

2. furnace comprising a firebox, coinbustiou chamber, a firewall between said lirebox and said con'ibustion chamber and spaced abovel the bottoms thereof, a `grate consistingof vertically disposed, depending grate hars spaced in front of said firewall having' its lower end spaced above the bottoni of said firebox, movable grate bars at the bottom of said irebox, and means wherebyv said grate bars may be operated to feed the .fuel towards said firewall.

3. A furnace comprising a iirebox, a coinbustion chamber7 a firewall between said Firebox and said combustion chamber and spaced above the bottoms thereof, a grate cmisising` of vertically disposed, depending grate bars spaced on front of said iirewall vwith its lower end spaced above the bottom of said firebox, and al movable horizontal grate for imparting a backward movement .to vthe live coa/l to bring the partly burned fuel back to and under said vertical grate.

In testinjiony whereof l hereunto allix my signature.

` CHESTER E. BETGHER.

Cri 

